Elemental10000000

I'm making a mud boss that creates a lot of mud particles that don't stop the mud boss from fully showing similar to disabling depth testing for entities but only when the particle is blocking the view from the player to the mud boss (Like in the picture here) . I tried creating a custom render type for the particle and enabling/disabling features of the RenderSystem but can't seem to create anything similar to the effect I was looking for. If anyone knows how to make a particle that has an effect similar to that then help would be greatly appreciated.